I have the same problem. I use Dyverso Granular particles. Every time I simulate with GPU it Realflow crashes usually at random frame. I tried it on Windows 10 it was crushing every time Video memory was filled up to 4Gigadytes or so. Now, in Windows 7 it crashes every time it reaches 1 GByte of Video memory. Sometimes it crashes right at the very first frame. I tried from 200K to 20M particles. I tried different settings, nothing helped. I tried Command line mode as well. That is what I got:

I get these errors all the time. The difference is that the memory addresses vary.I made a simple scene with 2 Dyverso Granular Domains, added a filter. Made it so that particles with particular speed moved from first domain to the second one. I got Error. I even had few crashes without GPU utilization. Without Filter there is now problem.